feat(nvim): ex-commands `:!` integration

[39555]

Looks like we've considered everything in discord and now everything should work well

Pr contains settings and comments for using Nushell for:

• filtering buffer content through external commands. Now :! :r! :w ! work just fine.
• vim diff mode with external diff commands nvim -d {file1} {file2} with set diffopt-=internal
• :make and quickfix buffer with makeprg

summary:

vim.opt.sh = "nu"
vim.opt.shelltemp = false
vim.opt.shellcmdflag = "--stdin --no-newline -c"
vim.opt.shellredir = "out+err> %s"
vim.opt.shellpipe = '| complete | update stderr { ansi strip } | tee { get stderr | save --force --raw %s } | into record'
vim.opt.shellxescape = ""
vim.opt.shellxquote = ""
vim.opt.shellquote = ""

Feel free to edit if I wrote something wrong)

[fdncred]

Are we waiting for more people to chime in or should we land this?

[melMass]

I've been using this config fine since its inception! I would merge and it can always be updated but it's working fine as is and allows more vim tricks than before!

[fdncred]

Agreed.